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If I replace my battery.....

camshaft

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camshaft Enthusiast

camshaft

Posted
Posted

I was going to replace my factory Ac Delco battery (600CCA) with my battery from my old truck (875CCA), but my question is this:

 

As soon as I disconnect the battery and hook uo my new (old) one, will I have any problems with passlock, radio settings, driver 1/2 settings ect.

 

Is there some type of internal battery that will keep these settings recorded for a few minutes, or will I be resetting everything from the clock to the driver positions?

 

Just thought I'd ask before I regret things later

Thx

71GMC_3/4T Enthusiast

71GMC_3/4T

Posted
Posted

I recently disconnected my battery for about 1/2 hour to change back to my original PCM.

 

I lost the clock setting. The stations were still okay though.

 

The Engine Oil Life reset back to 100%, but that may have been due to the PCM, not disconnecting the battery. I'd be interested to know if the battery disconnect was responsible for resetting the EOL monitor.

mcreyaufmiller Senior Enthusiast

mcreyaufmiller

Posted
Posted

If your lock is turned on on your radio, you will have to enter the code to unlock it. Double check before you pull the plug. Or, I have seen batteries with cigrette lighter plugs that back feed the entire system with 12 volts. This keeps the system powered, and it is not a full size battery.

99-2door Senior Enthusiast

99-2door

Posted
Posted
If your lock is turned on on your radio, you will have to enter the code to unlock it.  Double check before you pull the plug.  Or, I have seen batteries with cigrette lighter plugs that back feed the entire system with 12 volts.  This keeps the system powered, and it is not a full size battery.

 

 

 

 

Actually those are 9 volt batteries. The only thing you should have to reset with a quick battery change is the clock.

SLIVERDOWNCAST New Member

SLIVERDOWNCAST

Posted
Posted
If your lock is turned on on your radio, you will have to enter the code to unlock it.  Double check before you pull the plug.  Or, I have seen batteries with cigrette lighter plugs that back feed the entire system with 12 volts.  This keeps the system powered, and it is not a full size battery.

 

 

 

 

Actually those are 9 volt batteries. The only thing you should have to reset with a quick battery change is the clock.

 

 

 

 

 

Just a little tid bit here. A friend of mine changed his battery in a 2004 Chevy Avalanche. He lost all of his settings and computer settings. For example the blendor door for the A/C is computer controlled. It shut closed and blew nothing but hot air. It was a very lengthly process to reset everything. Sound real weird, but had to remove the key and take it at least 45ft away fro the truck. Then had to touch the negative to the postive for 1.2 seconds. Then hook it all back up,put key in ing. and turn on for 43.2 seconds. Then remove key and take away to the same distance, then come back and start truck. It took him all day to finally get a hold of a GM tech to explain what to do.

BBSilverado Enthusiast

BBSilverado

Posted
Posted

You can leave the truck running while changing the battery. the alternator will power everything while the battery is disconnected. Just make sure the positive cable and your wrench doesn't touch anything during the battery change.

99-2door Senior Enthusiast

99-2door

Posted
Posted
If your lock is turned on on your radio, you will have to enter the code to unlock it.  Double check before you pull the plug.  Or, I have seen batteries with cigrette lighter plugs that back feed the entire system with 12 volts.  This keeps the system powered, and it is not a full size battery.

 

 

 

 

Actually those are 9 volt batteries. The only thing you should have to reset with a quick battery change is the clock.

 

 

 

 

 

Just a little tid bit here. A friend of mine changed his battery in a 2004 Chevy Avalanche. He lost all of his settings and computer settings. For example the blendor door for the A/C is computer controlled. It shut closed and blew nothing but hot air. It was a very lengthly process to reset everything. Sound real weird, but had to remove the key and take it at least 45ft away fro the truck. Then had to touch the negative to the postive for 1.2 seconds. Then hook it all back up,put key in ing. and turn on for 43.2 seconds. Then remove key and take away to the same distance, then come back and start truck. It took him all day to finally get a hold of a GM tech to explain what to do.

 

 

 

 

 

Somebody fed him/you a load of BS. That truck doesn't know if the key is on the dash or in the next county.

Aquamoose Enthusiast

Aquamoose

Posted
Posted

Dude, it's a truck...

 

I'm sure the engineers have figured out a scenario when the battery will have to be replaced.

 

Also, I've disconnected batteries all the time when performing conversions & installations for emergency vehicle use.

 

Just disconnect the two cables, pull the battery out, clean the tray & contacts, install the new battery & recconect.

 

Set the clock & off ya go. Nothing complicated about it my friend.

chevy4x4trucks Senior Enthusiast

chevy4x4trucks

Posted
Posted

the only setting you loose is the time on your clock. i've bought a gm radio off of ebay and it had obviously been unhooked for about a month and it still had all of it's programmed stations.

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